Tìm x: a) -2/3 x + 1/5 = 3/10 b) -1/2 + 1/3 : x =1 c) 5 3/8 - 4/5 (x-1)
Giải thích
a)
−23x+15=310−23x=110x=110:−23x=−320
b)
−12+13:x=113:x=1+1213:x=32x=13:32x=29
c)
538−45x−1=43845x−1=538−43845x−1=1x−1=54x=94
a)
−23x+15=310−23x=110x=110:−23x=−320
b)
−12+13:x=113:x=1+1213:x=32x=13:32x=29
c)
538−45x−1=43845x−1=538−43845x−1=1x−1=54x=94